Set up or remove a Yahoo Mail account in the iOS Mail app

All apple mobile devices come with a pre-installed email app. While this app won't give you access to more advanced features found in the Yahoo Mail app (such as managing folders, your account info, and themes), you can add a number of Yahoo Mail accounts to send and receive emails from it.

The iOS environment supports 2 kinds of email notifications - Push and Fetch. Yahoo Mail is designed to work with Fetch, which will check for new emails at regular time intervals. You can decide how frequently the app checks.